When a show has been on as long as the Law & Order franchise has (Law & Order: OG has been on since 1990) it makes sense to assume that a fair share of actors would have trod their dusty precinct boards, but do you have any idea just how many of the L & O victims, suspects and defense lawyers have gone on to have huge film and television careers? Or just how many big named actors performed guest spots after they were already famous? So many! Luckily, the folks at Slacktory have rounded up the best of these appearances in one handy supercut.